check valve air compressor in tank compressed air 3/4″ male flare x 3/4″ male npt

3/4″ Flare x 3/4″ Male NPT In Tank Air Compressor Check Valve | Prevents backflow or tank Pressure from getting back to the air compressor pump once shut off. | This valve has a 1/8″ Female NPT Port on the side which usually goes to an unloader valve on your pressure switch or compressor pump. | Brass